adding mail boxes

i have Ubuntu Linux 9.10 server... i want to add mailboxes for postfix per domain name... i have add these through ISPConfig 3.0.1.6 and can log into the accounts through squirrel mail but can not receive mail or send mail...do i have to enter these mailboxes and users in postfit? if so how? thanks for any input

The MX record must point to your own server. You can create an A record like mail.kwickservers.com that points to your server's IP and then create an MX record for blackmagicpe.com that points to mail.kwickservers.com.

ok.. i know that i can now send emails from the accounts that are set up.. my problem now is i have to use a service to send emails out on port 2525. this service requires setting up an account with domains email account then they send a conformation email to that address for you to activate the service for said domain..